Using rows and column from bootstrap for mobile - html

Question

I am making a site and using bootstrap 3.3.5. The only problem I am having at the moment is the row/column structure I have is not displaying correctly on mobile.
Here is the link to the project: https://foreverfightermovie.herokuapp.com/#/home
It looks fine so far on a computer browser, but on mobile the ribbons are stacked onto of the middle panel section. Here is the html I am using:
<div class="jumbotron">
<h3 class="text-right" style="margin-right: 100px"> Production status: <b>Pre-Production</b> </h3>
<h1 class="text-center">The official site of <h1>
<div class="container">
<div class="row">
<div class="col-md-3">
<img src="/images/breast-cancer-ribbon.png" width="200" height="400" style="margin-left: 30px"/>
</div>
<div class="col-md-6">
<div class="panel-body text-center px-font" style="background-color: pink">
<br><b><FONT FACE="Lucida Console">FOREVER<br>FIGHTER</FONT></b><br><br>
<h3><i>"In life you can fight forever, but you can't live forever. One is a choice and the other is a guarantee"</i><h3>
</div>
</div>
<div class="col-md-3">
<img src="/images/breast-cancer-ribbon.png" width="200" height="400"/>
</div>
</div>
</div>
<br>
<p class="text-center"><a class="btn btn-primary btn-lg text-center" style="color: #2BDE73">
<img src="/images/kickstarter-logo.png" width="30" height="30"/>
Click for Donation Pledges</a></p>
</div>
Also: Here is the css I am using:
.tab { margin-left: 20px;
margin-right: 20px; }
.imagetab { margin-left: 40px;
margin-right: 40px;}
.para {
text-indent: 40px;
}
.jumbotron {
margin-left: 30px;
margin-right: 30px;
}
html {font-size: 90%;}
div.px-font {
font-size: 110px;
}
Does anyone have any suggestions on how to fix it?

Answer 1

Bootstrap's strength is stacking, but you can override whatever you'd like in your custom CSS. For what you'd like to do I'd use a media query with Bootstrap's built-in breakpoints. Here's a simple example:
#media (max-width: #screen-sm-min) {
/* This is the row containing your main panel and two ribbon divs. */
.main-row {
position: relative;
}
/* Add this to each of your ribbons. The ".left" & ".right" are self-explanatory. */
.ribbon {
position: absolute;
top: 100px;
}
.ribbon.left { left: 0px; }
.ribbon.right { right: 0px; }
/* Resize your images here to fit as you'd like them. */
.ribbon img {
height: 100px;
width: 50px;
}
}
You can find some more info on the queries Bootstrap offers here: http://getbootstrap.com/css/#grid-media-queries